Valve action for internal-combustion engines



Nov. 25, 1930. v E. s. cAMERoN 1,782,839

VALVE ACTION FOR INTERNAL COMBUSTION ENGINES Filed March-17, 1928v wy BY wmp-1 ATTORNEY t `lafanied Nev. 25.21.930

nvnmsrrrs.` cAMERoN,oF 'rom'.unnvri-.iiEl,kie-rinwxronli "A" l VALVE ACTION Fon4 INTERNnn-Qoiiiisusrioninverting y Application mea Maren `17', 192,5.Qmscegia1- ,No.,aezsenff @15 type wherein each engine cylinder is pro- ."vided with two inlet `valves and two outlet valves, each pair of inlet valves being actuated by a-rocl ershaft and each pair of eX- haust `.valves beingy acted upon by another f1 y 170 `rocker-shaft.

The main objects of the invention are to provide a construction of this type wherein provision `is made for properly guiding the actuating means for each pair of valves; to

.15 produce a design of this type which is eX- ceedingly simple in construction, eiicientin operation, durable in use, and wherein proper lubrication of the moving elements `is 20 Another object of 'the invention is to so design the actuating means that the strokes ofthe valves may be conveniently varied,

` `according tothe requirements.

i With these and other objects inf view, which will more fully appear as the nature of the invention is better understood, the saine consists in the combination, arrange* ment and construction of parts hereinafter described, pointed out in the appended claim and illustratedin the accompanying drawings, it being understood that many changes may be made in the size and proportion of within the `scope of the appended claim, Without departing from the spirit or sacriicing any of the advantages of the invention.

`the invention is illustratedin the accompanying drawings, in which actuating means constructed in accordance with the present invention; Fig. 2 is a secvtion taken on line 2-2 of Fig. 1; Fig. 3 is "l a section taken on line 33 of Fig. 1; Fig. 4 is a front elevation of the rocker-lever operated sleeve of the device; and Fig. 5 is a side elevation of the element shown in op Fig. 4; t n the drawings, the numeral 10,1nd1cates the several parts and details of construction One of the many possible embodiments ofl Figure 1 is a front elevation of a. valve" a"1;portioilA of one ofthe valve cages oi van.

vengine cylinder, saidV cage "being provided with `valveuseats "11, with which co-operate twoinlet valves 120i thepoppet type. `(Each valve "is provided with a stem`f`13. which cir-f'- 55 tends through a guide 14, the latterbeng made in'thefform of a separate7piece` and held upon thefval've cagein a"Inanner` hereinafter to Abedescribed.` The "stenispiovided vadjacent its ,outer endwitha reduced portion 15, intowhich `is fitted; a'stopl of any. suitable. construction. Against this stop bears f a Y spring f seat"V 17,1fa`nd] in alignment therewith is held against ashouldel*1,8` @El thexguidell a valve seat 19. fBetwe'ei Vthese, 65 i tyvp`- seatsisfarranged a spring '20, ,coiled around the valve stem andservingto hold thelvalve rin its closed positionfas shown in Figsf2'and` 3 of fthe drawingslj'lhe valve'` A stemffis providedat"itsgo'uteri end with a rel` 70 duced portion f21, whereby a shoulder` 22 is? formed thereon.` `On this reduced lp`ortio1`i'is mounted a ciitact Yscrew 23, bearing'fagainst the shoulder `22` andbein'g carried h'y'g`ii1` thereinafter` "to` be described."

"valveactuating means comprises roclrershaftfQli, mounted finaA stationaryv bearing sleeve 25.*` `This rocker-shafted. operates with a pair oi inlet valves, as shown infiiigl i' ofthe drawings, it havinggxedtp its Lipper; end, above' theA bearing sleeve 2,5, a rocker-'lever '26Wh in engagement? with an" anti!" friction ,roller 27, the "latter" beingj mounted,

upona"sleeve28'.'A This sleeve"isslidablv` A mounted, .nthev direction of its" longitudinal 85 airis, ii'poI'i;ahhollow spindle/oir support 29.` f The [spindle` is `iiredftd'the engine]cylinderl Y between lpair of inlet valves,""in `any" suitf" able .mannenM The4 inner endn Tothisspindle is-inj the case illustrated" inthe drawings permanently closedby a screw'bqlt 30,? which servesto X ',the'sane tothe engine' cylinder.` The 'outer Qend'of'the hollow spindle, on the other hand; is closed by. adetajchable screw plug 31; Into the ,said hollow spindle'f'is 95 packedgrease or alike lubricating material, whichftfinds its 4wayhto theinner falce of" the sleeve 28 through` openings 32;` f These openings extend radially.` "through f the hollow spindlef nthe ?'s"leeve'"'28 'are "formed two valve-operating prongs 33, each of which is provided with a screw-threaded bore 34, the threads of each bore meshing` with those of contact screw 23 above referred to. These contact screws bear, as above described, against the shoulders 22 of the valve stems 13.

The rocker-shaft 24 serves to reciprocate. the sleeve 28 on the spindle 29. When the sleeve is moved in the direction of the arrow shown in 2 of the drawings, the pair of inlet valves are moved toward opening positions, the springs returning the same to closing positions when the sleeve is moved in the opposite direction. Y

rPhe sleeve and the valve-operating prongs 33 thereon are properly guided in their reciprocating movement by the said spindle. Friction between the sleeve and the spindle is reduced to a minimum by reason of the fact that the grease that is packed into the hollow spindle finds its way to the interior surface of the sleeve through the openings 32 above described.` The contact screws 23 permit of regulating the proper amount of opening to be given the valves. y

It is obvious that, While herein the construction and operation of the actuating means for the inlet valves of an engine cylinder have been described, the invention is applicable to exhaust valves without any change in the design of said actuating means. It is also obvious that, while herein a speciiic valve `construction has been described, the actuating means herein disclosed are adapted to be used in connection with other valves just as well, the invention lying mainly in the provision of a pair of valve-operating prongs which are reciprooably mounted-upon a support and guided by the latter in their alternating movement, in combination with means for properly lubricating the contact surfaces between the valve-operating prong carrier and its supporting guide.

`What I claim is:

The combination with a valve cage provided with two valve seats, of two springcontrolled valves co-operating with said seats, said valves being normally maintained in their closed positions by the springs cooperating therewith, a stationary hollow guide spindle arranged in parallel relation to the stems of said valves, said spindle being adapted to contain lubricating material, a sleeve reciprocably mounted on said spindle, said spindle being provided with openings leading from its interior to that face of said sleeve which contacts with said spindle, whereby the lubricating material finds its way to the inner Jface of said sleeve, two prongs on to said sleeve in engagement with said valves, an anti-friction roller on said sleeve, and a rockershaft provided with a lever in engagement with said anti-friction roller for longitudinally shifting said sleeve, whereby said valves are simultaneously 

